[R] Bug in col2rgb?

[hadley wickham]

> col2rgb("#00000079", TRUE)
      [,1]
red      0
green    0
blue     0
alpha  121
> col2rgb("#00000080", TRUE)
      [,1]
red    255
green  255
blue   255
alpha    0
> col2rgb("#00000081", TRUE)
      [,1]
red      0
green    0
blue     0
alpha  129


Any ideas?

Thanks,
Hadley

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